JP2003063754A - Elevator system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simplified-structure elevator system with the car driven up and down stably by a simple driving unit, suitable for installation in low-rise buildings. SOLUTION: A threaded pole 1 and two guide poles 2 and 3 are vertically erected each occupying a vertex of a triangle in plan view. An elevation nut 7 engaging with the threaded pole 1 and elevation sliders 8 and 9 sliding on the guide poles 2 and 3, respectively, are connected by beams 10 for the formation of an elevation frame 4 shaped triangular as a whole in plan view. An elevation motor 21 for rotating the elevation nut 7 for driving the elevator frame 4 up and down and an elevator gage 5 are mounted on the elevator frame 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus for moving an elevator cage up and down by a screw drive system.

[0002]

2. Description of the Related Art An elevator apparatus of this type is disclosed in, for example, the following publication. [Patent Document 1] JP-A-2000-86117 [Patent Document 1] Japanese Unexamined Patent Publication No. 2000-86117 One vertically moving screw is vertically supported on a rectangular frame having four vertical columns, and a nut attached to an elevator cage is screwed to the vertically moving screw to be integrated with the nut. The timing pulley is rotated integrally with the nut via the timing belt by the servo motor, and the elevator cage is moved up and down while guiding the four corners of the elevator cage along the guide portions at the four corners of the frame.

[Patent Document 1] Japanese Unexamined Patent Publication No. 6-329360 DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Three ball screw nuts mounted on the upper end of an elevator box are screwed onto three vertical screw shafts, respectively.
The transmission chain is hung around the three transmission sprockets that are integrated with these ball screw nuts, and the rotation from the motor is transmitted through the drive chain to the reduction sprockets that are integrated with one ball screw nut. By simultaneously rotating the three ball screw nuts through the chain, the elevator box is moved up and down with respect to the three screw shafts.

[0004]

However, according to this method, a pedestal in the shape of a rectangular parallelepiped for guiding the elevator cage is required, and the size of the apparatus becomes large.

According to this, the driving mechanism for simultaneously rotating the three ball screw nuts is complicated. Also, 3
Since the elevator box is propelled from its upper end as an upper end supporting structure in which the upper end is supported by three ball screw nuts with respect to the vertical screw shaft of the book,
The elevator box is unstable.

The object of the present invention is to make it possible to raise and lower the elevator cage in a stable state and with a simple drive mechanism in addition to having a simple structure as a whole, which is suitable for installation in a low-rise house or the like. Type elevator device.

[0007]

In the elevator apparatus according to the present invention, one screw pillar and two guide pillars are vertically erected so as to be positioned at the three vertices of a plane triangle, and screwed onto the screw pillar. The elevating nut and the two elevating sliders that slide along each of the two guide columns are connected by a beam member to form an elevating frame having a planar triangular shape as a whole. It is characterized in that an elevator motor for raising and lowering an elevating underframe by rotating a nut and an elevator cage are mounted.

Three elevating sliders that slide along each of the screw pillar and the two guide pillars are connected by a beam member to form an elevating upper frame having a triangular shape as a whole, and the elevating cage is mounted on the elevating upper frame. By supporting the upper end of the elevator car, the stability of the elevator car can be improved.

The lifting nut has a worm nut having a female screw formed on the inner circumference and a worm formed on the outer circumference, and a worm gear screwed on the worm, which is built in the gear box of the lifting nut. The shaft is connected to the shaft of the lifting motor.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in the overall structure of FIGS. 1, 2 and 3, this elevator apparatus has one screw column 1 and two guide columns 2.3 located at the three vertices of a plane triangle. The upper and lower ends are vertically supported by supporting the upper and lower fixed surfaces so as to be in a positional relationship, and the elevator cage 5 is mounted on the lower elevator frame 4 that moves up and down along these, and the elevator cage The upper end of 5 is supported by the upper lifting upper frame 6, and the elevator car frame 5 is lifted up and down together with the lifting base frame 4.

The lifting frame 4 includes a lifting nut 7 screwed onto the screw pillar 1 and two lifting sliders 8 and 9 which slide along the two guide pillars 2 and 3, respectively. Are connected to each other to form a plane triangular frame body as a whole.

The elevating upper frame 6 is formed by connecting three elevating sliders 11, 12, 13 sliding along the screw column 1 and the two guide columns 2.3 by beam members 14 as a whole. The frame is a plane triangular shape.

4 and 5 show the structure of the lifting nut 7. The lifting nut 7 is a female screw 15a that is screwed into the screw post 1.
The worm nut 15 having the worm 15b formed on the inner circumference and the worm 15b formed on the outer circumference, and the worm gear 16 screwed to the worm 15b are built in the gear box 17, and the screw column 1 is passed through the lower surface of the gear box 17. A guide cylinder 18 is vertically installed. Worm nut 15
Is borne by the bearing 19 in the gear box 17, and the worm gear 16 has its shaft 16 a borne by the bearing 20 in the gear box 17.

The gear box 17 has a mounting base 17a and is fixed to the beam 10 by this mounting base 17a. The shaft 16a of the worm gear 16 is connected to a motor shaft of a lifting / lowering motor 21 mounted on the lifting / lowering frame 4 as shown in FIGS. 1 to 3, and the worm gear 21 is driven by the lifting / lowering motor 21. When 16 is rotated, its rotation is transmitted to worm nut 15.

The elevating sliders 8 and 9 have the same structure as shown in FIG. 6, and a pair of upper and lower thrust bearings 22 respectively.
It is slidable with respect to the guide columns 2.3. By providing the thrust bearings 22 on the upper and lower sides, even if an unbalanced load is applied to the elevating base frame 4, it is possible to smoothly slide the guide columns 2 and 3. The lifting sliders 11, 12, and 13 of the lifting upper frame 6 have the same structure.

Since this elevator apparatus is constructed as described above, when the lifting motor 21 rotates in the normal direction, the worm nut 15 of the lifting nut 7 is screwed upward with respect to the screw column 1, so that the lifting frame is raised. 4 rises along the screw post 1 and the two guide posts 2.3 to lift the elevator cage 5, and the elevator upper frame 6 is integrated with this along the screw post 1 and the two guide posts 2.3. And rises to prevent the elevator cage 5 from rocking.

When the lifting motor 21 is rotated in the reverse direction, the worm nut 15 of the lifting nut 7 is screwed downward with respect to the screw column 1, so that the lifting frame 4 becomes the screw column 1 and the two guide columns 2.3. The elevator car 5 descends along with it, and the elevator upper frame 6 also descends along with the screw pillar 1 and the two guide pillars 2.3.

[0019]

As described above, in the elevator apparatus according to the present invention, one screw pillar and two guide pillars are arranged at the three vertices of the plane triangle, and the lifting nut screwed to the screw pillar is used. And the two lifting sliders that slide along each of the two guide columns are connected by a beam member to form a lifting triangle with a plane triangular shape as a whole, and the elevator cage is mounted on this lifting cage. No guide means other than one screw pillar and two guide pillars is required, and the drive mechanism is simple and the entire device is simple. Therefore, a simple elevator suitable for installation in a low-rise house or the like. It is highly practical as a device.

According to the second aspect of the present invention, the elevator cage can be prevented from swinging by the lifting triangle having a plane triangular shape as a whole, so that the elevator cage can be raised and lowered in a stable state.

According to the third aspect of the invention, the rotation can be smoothly transmitted to the lifting nut constituting the drive mechanism, and the structure of that portion can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view of the same.

FIG. 4 is a cutaway perspective view of a lifting nut that constitutes a drive mechanism.

FIG. 5 is a simplified sectional view of a lifting nut.

FIG. 6 is a simplified cross-sectional view of a lift slider.

[Explanation of symbols]

1 screw post 2.3 Guide pillar 4 Lifting frame 5 elevator cage 6 Lifting upper frame 7 Lifting nut 8.9 Lifting slider 10 Beam material 11.12.13 Lifting slider 14 Beam material 15 Worm Nut 15a female screw 15b worm 16 Worm Gear 16a axis 17 gearbox 17a Mounting part 18 guide tube 19/20 Bearing 21 Lifting motor 22 Thrust bearing

[Procedure amendment]

[Submission date] September 5, 2001 (2001.9.5)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

In the elevator apparatus according to the present invention, one screw pillar and two guide pillars are erected vertically,
An elevating nut screwed onto the screw column, and two elevating sliders that slide along each of the two guide columns,
With the beam material, the lifting frame of the plane triangle is constructed as a whole,
An elevator motor and an elevator cage for rotating the lifting nut to raise and lower the lifting frame are mounted on the lifting frame.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

[0019]

As described above, according to the elevator apparatus of the present invention, one screw pillar and two guide pillars are erected vertically, and a lifting nut screwed to the screw pillar and two guide pillars are installed. The two lifting sliders that slide along each of them and the beam material together constitute a lifting triangle of a plane triangular shape, and since the elevator cage is mounted on this lifting rack, one screw pillar and two
No guide means other than the guide pillars of the book is required, the drive mechanism is simple, and the entire device is simple. Therefore, it is highly practical as a simple elevator device suitable for installation in a low-rise house or the like.

Claims (3)

[Claims] 1. An elevating nut and two guides which are vertically erected so that one screw pillar and two guide pillars are arranged vertically at the three vertices of a plane triangle and screwed onto the screw pillar. Two elevating sliders that slide along each of the columns are connected by beam members to form an elevating underframe having a generally triangular shape, and the elevating underframe is rotated by rotating the elevating nut on the elevating underframe. An elevator apparatus comprising a lifting motor for lifting and lowering an elevator and an elevator cage. 2. An elevator upper frame having a plane triangular shape as a whole by connecting three elevator sliders sliding along a screw column and two guide columns with a beam member. The elevator apparatus according to claim 1, wherein an upper end of the elevator cage is supported. 3. The lifting nut comprises a worm nut having a female screw threaded on a screw column on the inner circumference and a worm thread formed on the outer circumference, and a worm gear screwed on the worm, built into a gear box. The elevator apparatus according to claim 1 or 2, wherein the shaft of the gear is connected to the shaft of the lifting motor.